S. Horchler et al., SYNTHESIS AND STRUCTURE OF AN ANIONIC ALUMINUM-NITROGEN COMPOUND CONTAINING A LADDER-SHAPED CORE, Journal of the Chemical Society. Dalton transactions, (16), 1997, pp. 2761-2763
An X-ray crystallographic study of the aluminum-nitrogen compound C52H
78Al4Li2N4 showed it to possess a ladder-shaped (AIN)(4) core. The mes
ityl ligands of the inner nitrogen atoms are each metallated by one of
their neighbouring aluminium atoms, while on the outer negative charg
e is localised. The reported structure is the first tetrameric anionic
Al-N compound.